Question

Rút gọn : 

a, 3939-101/3.2929+505

b, 6.4+6.7/6.5+12

c,6.9+2.17/63.3-119

d, 25.9-25.17/-8.80-8.10

e, 48.12-48.15/-3.270-3.30

f, 2⁵.7+2⁵/2⁵.5²-2⁵.3

g, 3⁴.5-3⁶/3⁴.13+3⁴

Answer 1

a/\(\frac{3939-101}{3.2929+505}=\frac{39.101-101}{8787+505}=\frac{101.\left(39-1\right)}{87.101+5.101}=\frac{101.38}{101.\left(87+5\right)}=\frac{38}{92}\)

\(=\frac{38}{92}\)

Answer 2

b/\(\frac{6.4+6.7}{6.5+12}=\frac{4+1.7}{1.5+2}=\frac{4+7}{5+2}=\frac{11}{7}\)

Answer 3

\(\frac{6.4+6.7}{6.5+12}\)\(=\frac{6.4+6.7}{6.5+6.2}\)\(=\frac{6.\left(4+7\right)}{6.\left(5+2\right)}\)\(=\frac{6.11}{6.7}\)\(=\frac{11}{7}\)